US370403A - Bridge-guard - Google Patents

Description

(No Modele.) y

' W. C. NEWMAN.

BRIDGE GUARD.

.No.`370,40e.

Patented Sept. 27,1887'.

' UNiTED STATES .PATENT FFICE.

`VILLIAM C. NEWMAN, OF CHARLEVOIX, MICHIGAN.

BRIDGE-=GUARD.

SPECIFICATION forming part of Letters Patent No. 370,1=O3I dated September 27, 1887.

Application filed June 4, 188.7. Serial No. 240,289. (No model.)

To @ZZ whom it may concern.:

Be it known that I, WILLIAM C. NEWMAN, a citizen of the United States, residing at Charlevoix, in the county of Charlevoix and State of Michigan, have invented a new and useful Improvement in Bridge-Guards, of which the following is a specification.

My invention relates to an improvement in bridge-guards; and it consists in the construction and arrangement of the parts of the same, which will be more fully hereinafter described, and pointed out in the claims.A

My present invention is an improvement upon Patent No. 348,410 granted to me August 3l, 1886.

The object of my presentinvention is to pro-l vide a more simple form of guard having a more positive operation,being adapted to raise the two portions of a gate when the bridgedraw is closed and to cause said gate to drop when the draw is opened. Iattain this object by the device illustrated in the accompanying drawings, wherein like letters of reference indicate similar parts in the several views, and in which- Figure l is a perspective view of a portion ofa bridge with my improvements shown in connection therewith. Fig. 2 is a bottom plan view of a bridge platform or flooring. Fig. 3 is a transverse vertical sectional View on the line a: a: of Fig. 2.

A indicates the flooring of the bridge, to the under side of which is a centrally-pivoted 1ever, B, which, when the draw is closed, is pressed back under the flooring A, as shown in Fig. 2, and when the draw is opened it turns out over the end of the platform A, as seen in Fig. l. The inner end of this lever B is provided with a link or eye, b, to which two chains or ropes, C C, are secured, which pass right and left through sheaves or pulleysc c, mounted in connection with the underside of the ooring A by means of a strap, c', and thence pass out through the sides of the bridge through openings c2 into metal projections, forming bearings for sheaves or pulleys c3, and under said pulleys, and are thence connected to the .ends of gravity gate-bars D, which are mounted in the projections c4, which extend above the bridgesurface a suitable distance to have thedesired function. The pivots, which form the means of uniting the said gate-bars D, in connection with the projections, pass through the said gatebars at such a point that one end thereof will overbalance the other end,`and when'the lever B is released by the opening of the draw the said gate-bars D will drop by gravity and automatically close the bridgeopening. The gate-bars D have suitable stops, d, pivotally mounted in connection therewith, which, when the gate-bars are in a lowered position, will rest upon the top ooring of the bridge. By this means it will be seen that I obtain an automaticallyoperated bridge gate or guard adapted to be usedin connection with drawbridges, which are used for the purpose well understood in the art.

The novelty and utility of my improved device being obviously apparent, it is unnecessary to'further enlarge upon the same herein.

Having thus described my invention, I claim* l. The combination of the centrally-pivoted lever B, the ropes or cables G C, and the levers or bars D, substantially as described.

2. The combination of the centrally-pivoted lever B, the ropes G C, connected to the inner end thereof, passing through sheaves c and through openings in the side of the bridge, and the gate-bars D, mounted in the projections c some distance above the top flooring ofthe bridge, substantially as described.

In testimony that I claim the foregoing as my own I havehereto aflixed mysignaturein presence of two witnesses. v

VILLIAM C. NEWMAN.

Witnesses:

E. I-I. GREEN, GEORGE W. MILLER.

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